Engine-indicator.



H. 0. HOLT.

ENGINE INDICATOR.

APPLICATION FILED DEC. I5. 1916.

L w gfi. Patented Jan.15,1918.

HARRY 0. HOLT, 0F BRGOKLYN, NEW YORK.

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Specification of Letters Patent.

Patented Jain. l5, idle Application filed December 15, 1916. Serial No. 137,262.

To all whom it may concern:

Be it known that I, HARRY O. HOLT, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Engine-Indicators; and I do hereby declare the following to be a. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in indicators of the type employed for ascertaining which of the cylinders in a multiple cylinder engine requires attention when one or more of the cylinders miss fire, and an object of the invention is the provision oil a device of this nature that can be inserted within the opening in a cylinder jacket that receives the ordinary priming cup, the said indicator being of such construction that it can be set to operate either on a high or low power motor.

Another object of the invention is the provision of a device of this nature that will be of simple construction, can be cheaply manufactured, and will be durable and efii cient in operation.

Other objects will appear and be better understood from that embodiment of the invention of which the following is a specification, reference being had to the accompanying drawing forming a part thereof, in which:

Figure 1 is a detail view of the upper end of a multi-cylinder engine, showing the improved indicator associated with one of the cylinders thereof,

Fig. 2 is a vertical sectional view, taken through the indicator at a point above the valve,

Fig. 3 is a vertical elevation of the indicator, showing the same mounted on the side of the engine cylinder.

Referring to the drawing in detail, the letter A designates a multiple cylinder engine of the type employed in an automobile.

The indicator is designated, as an entirety by the numeral 1 and consists of a sleeve 2, one end of which is formed integral with a. globular valve casing 4, the said valve casing being provided, at a point diametrically opposite the sleeve, with a nipple 5. The interiors of the nipple 5 and the sleeve 2 communicate with the interior of the valve casing 4, and a rotary valve is positioned within the casing 4: and is adapted to control communication between the nipple and the sleeve. A handle 6 is located exteriorlv of the casing 4. and has connection with the valve, within the casing, so as to admit of the convenient manipulation of the valve. A plunger 7 is slidably mounted within the sleeve 2 and has its upper end extended above the upper end 01 the sleeve and extended through an opening in a weigl'it Upon inward movement oi? the plunger 7 the weight 8 will engage the upper end of the sleeve 2 and limit the movement at the plunger. As shown in Fig. 1, when the indicator 1 is to be associated with a cylinder having a priming cup disposed at the top wall thereof, the priming cupis removed and the nipple 5 inserted within the opening for the priming cup, the said nipple 5 threaded for this purpose. When the indicator is to be associated with a cylinder having a priming cup located at the side thereof, suitable l. coupling, designated 9. in. Fig. 3 of the drawing. has one end inserted in the opening that receives the priming cup and the opposite arm of the l.- shaped coupling receives the threaded nipple 5 on the valve casing i. A laterally eX- tending flange 10 is carried by the first mentioned arm of the coupling 9 and en gages the adjacent sideof the engine jacket and is secured thereto by means of a suitable fastening element 11 which extends through an opening in the flange 10 and engages in the wall of the jacket. The flange 10 me vents the weight of the indicator 1 From turning the coupling 9.

When the valve within the casing at is turned to the position wherein communication will be established between the interiors of the sleeves 2 and 5, and the engine started, the plunger 7 will be forced upwardly at each explosion within the adjacent cylinder. If the charge within the cylinder is not enploded, the plunger 7 will remain stationary, thereby indicating the engine cylinder is at fault. It will of course, be understood that each cylinder may be provided with an in dicator, or if desired one indicator can be interchangeably associated with the difien ent cylinders.

A pair of fingers l2 depend from the under side of the weight 8 and lie on opposite sides of the sleeve 2 and have their lower ends bent inwardly, as shown at 13. Upon upward movement of the plunger 7, the

being Mill llllli lillll fingers 12 will be raised upwardly, with the weight 8, and the inwardly directed terminal 13 will engage against an annular shoulder 14 formed on the sleeve 2,. at a point above the lower end thereof, so as to limit the upward movement of the plunger and prevent the same from being bodily projected from the sleeve 2. A plurality of removable metal disks 15 are mounted on the weight 8 and are arranged in superposed position and have concentric openings therein which receive the upper end of the plunger 7, the disks being held on the weight 8 by means of a wing nut 16 that is turned. on the upper end 01 the plunger 7 and adjustable against the uppermost disk 15. The disks 15 cooperate with the weight 8 for increasing the load that has to be raised by the explosion in the cylinder, and if the indicator is mounted on a relatively high powered motor a number of disks 15 are superposed on the weight 8. If the indicator is associated with a cylinder of a low power motor one or more of the weights 15 can be removed so that the plunger can be projected by an explosion having a less degree of power.

It will, of course, be understood that various changes might be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of the invention as claimed.

Having thus described my invention what I claim as new, is:

1. In an internal combustion engine indicator, the combination with a sleeve having a combustion operated plunger therein,

Copies of this patent may be obtained for five cents of a shoulder carried by the-sleeve, and means associated with the plunger and normally lying spaced from the shoulder and adapted to engage the shoulder upon the movement of the plunger in one direction, so as to limit the movement of the plunger in the mentioned direction.

In an internal combustion engine indicator, the combination with a sleeve, a combustion operated plunger therein and a shoulder on the sleeve, of a pair of arms associated with the plunger, and means carried by the arms and normally lying in spaced relation with the shoulder and adapted to engage the shoulder upon movement of the plunger in one direction so as to limit the movement of the plunger in. the mentioned direction. p

3. 1X11 internal combustion engine indicator of the class described consisting of a sleeve adapted to be arranged in communication with the interior of an engine cylinder, a combustion operated plunger mounted within the sleeve, a plurality of remov-.

able weights carried by the upper portion of said plunger, said weights adapted 'to engage the upper end of said sleeve for limiting the downward movement of said plunger, and means. for limiting the upward movement of said plunger, as and for the purpose specified. 7

In testimony whereof I aflix my signature in presence of two witnesses. H

HARRY O. HOLT.

iVitnesses SEBASTIAN VOLLARO,

Fnnnnmon L. PARK.

each, by addressing the Commissioner of Patents,

Washington, D. G. 

